src/test/ui/overloaded-calls-nontuple.rs

   1 #![feature(fn_traits, unboxed_closures)]
   2
   3 use std::ops::FnMut;
   4
   5 struct S {
   6     x: isize,
   7     y: isize,
   8 }
   9
  10 impl FnMut<isize> for S {
  11     extern "rust-call" fn call_mut(&mut self, z: isize) -> isize {
  12         self.x + self.y + z
  13     }
  14     //~^^^ ERROR A function with the "rust-call" ABI must take a single non-self argument
  15 }
  16
  17 impl FnOnce<isize> for S {
  18     type Output = isize;
  19     extern "rust-call" fn call_once(mut self, z: isize) -> isize { self.call_mut(z) }
  20     //~^ ERROR A function with the "rust-call" ABI must take a single non-self argument
  21 }
  22
  23 fn main() {
  24     let mut s = S {
  25         x: 1,
  26         y: 2,
  27     };
  28     drop(s(3))  //~ ERROR cannot use call notation
  29 }